Your brother can appoint an agent, i.e you, as long as you stay resident in the state to manage the property, (or a professional letting agency) to receive rents on behalf of him when he becomes an NRL. This takes away the obligation of the tenant deducting the tax due. You will then be chargeable in the name of your brother and can collect the rent, gross, and then retain the standard 20% from the rents received to satisfy the tax payable, before passing the remaining rental income to your brother. You won't need to pass a Form R185 to him then either. You will then be required to submit an annual tax return and accounts for the tax due, under self assessment. Hope this helps!